Tuna is a good source of many healthful nutrients, especially selenium, potassium, Vitamin D, Vitamin A, Vitamin B12, and omega-3 fats (the good kind of fat). For essential B12, a serving size of 100 grams of tuna fish provides 2.2 micrograms.
If you need easy-to-peel eggs and you have fresh eggs, you might want to try steaming the eggs for 15 minutes. Pour an inch of water into a pot and insert a steamer basket.Bring to a boil. Place the eggs in the steamer basket, cover and steam for 15 minutes (more or less, check!).
Hard-cooked (boiled) eggs â 19 minutes. A hard-cooked egg has both a firm white and a firm yolk. Hard-cooked eggs should never be boiled â always simmer them in water. If you cook them for too long, the protein toughens (becomes rubbery) and a greenish or purplish ring forms around the yolk.